Briefly - Crowfall is large scale MMO with procedural terrain generation, voxel building & destruction, likely very frequent changes of sex/class/race (account is tied to crow spirit, not the body - so after death you might have to fly and search for new corpse to possess!?) and so on. Good quick intro is it's IGN Wiki, also here's an Imgur album with hundreds of pics and screenshots.

Access to alpha is kinda expensive, but there should be open beta (free tests) before soft launch "next summer", requiring only registration on the site.